HOTFIX: Ignore streaming UI test

This is currently causing many builds to hang.

https://issues.apache.org/jira/browse/SPARK-1530

Author: Patrick Wendell <pwendell@gmail.com>

Closes #440 from pwendell/uitest-fix and squashes the following commits:

9a143dc [Patrick Wendell] Ignore streaming UI test

streaming/src/test/scala/org/apache/spark/streaming/UISuite.scala

@@ -26,7 +26,8 @@ import org.scalatest.time.SpanSugar._
 
 class UISuite extends FunSuite {
 
-  test("streaming tab in spark UI") {
+  // Ignored: See SPARK-1530
+  ignore("streaming tab in spark UI") {
     val ssc = new StreamingContext("local", "test", Seconds(1))
     eventually(timeout(10 seconds), interval(50 milliseconds)) {
       val html = Source.fromURL(ssc.sparkContext.ui.appUIAddress).mkString